Code optimization

Question

When i\'m trying to optimize my code, I often run into a dilemma:

I have an expression like this:

int x = 5 + y * y;
int z = sqrt(12) + y * y;
         


        

Answer 1

Trying to optimize your code most often means giving the compiler the permission (through flags) to do its own optimization. Trying to do it yourself will more often then not, either just be a waste of time (no improvement over the compiler) or worse.

In your specific example, I seriously doubt there is anything you can do to change the performance.